I hope you are wrong. I hope you are just being fatalistic.
But I think your aren’t wrong, nor fatalistic.
Even if we were only facing the threats and unprincipled deceits from our own “leaders”, the west is in for a rough ride. Seeing the throngs of military-aged Muslim men swarming into Europe, nothing good is going to come from that.
Keep your skills up, maintain situational awareness, and be ready. That’s all we can do at this point.
To that, I would add "network" both at home and beyond. A lone sheepdog is much less apt to stop a pack of ravening wolves than is an organized, focused, and trained group of sheepdogs.
But a 1,400 year track record for a conquest plan that keeps defeating "stronger and more advanced" civilizations bears careful study.